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git.saurik.com Git - apple/xnu.git/blob - libsyscall/custom/SYS.h
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28 /* Copyright (c) 1992 NeXT Computer, Inc. All rights reserved.
32 * Definition of the user side of the UNIX system call interface
35 * Errors are flagged by the location of the trap return (ie., which
36 * instruction is executed upon rfi):
38 * SC PC + 4: Error (typically branch to cerror())
42 * 18-Nov-92 Ben Fathi (benf@next.com)
45 * 9-Jan-92 Peter King (king@next.com)
49 #include <sys/syscall.h>
52 #define SYS_setquota 148
58 #if defined(__ppc__) || defined(__ppc64__)
60 #include <architecture/ppc/mode_independent_asm.h>
66 #define SYSCALL(name, nargs) \
68 MI_ENTRY_POINT(_##name) @\
73 1: MI_BRANCH_EXTERNAL(cerror)
76 #define SYSCALL_NONAME(name, nargs) \
82 1: MI_BRANCH_EXTERNAL(cerror) @\
86 #define PSEUDO(pseudo, name, nargs) \
87 .private_extern _##pseudo @\
91 SYSCALL_NONAME(name, nargs)
93 #define __SYSCALL(pseudo, name, nargs) \
94 PSEUDO(pseudo, name, nargs) @\
97 #elif defined(__i386__)
99 #include <architecture/i386/asm_help.h>
100 #include <mach/i386/syscall_sw.h>
103 * We have two entry points. int's is used for syscalls which need to preserve
104 * %ecx across the call, or return a 64-bit value in %eax:%edx. sysenter is used
105 * for the majority of syscalls which just return a value in %eax.
108 #define UNIX_SYSCALL_SYSENTER call __sysenter_trap
109 #define UNIX_SYSCALL(name, nargs) \
112 movl $ SYS_##name, %eax ;\
113 UNIX_SYSCALL_SYSENTER ;\
115 BRANCH_EXTERN(cerror) ;\
118 #define UNIX_SYSCALL_INT(name, nargs) \
121 movl $ SYS_##name, %eax ;\
124 BRANCH_EXTERN(cerror) ;\
127 #if defined(__SYSCALL_32BIT_ARG_BYTES) && ((__SYSCALL_32BIT_ARG_BYTES >= 4) && (__SYSCALL_32BIT_ARG_BYTES <= 20))
128 #define UNIX_SYSCALL_NONAME(name, nargs) \
129 movl $(SYS_##name | (__SYSCALL_32BIT_ARG_BYTES << I386_SYSCALL_ARG_BYTES_SHIFT)), %eax ;\
130 UNIX_SYSCALL_SYSENTER ;\
132 BRANCH_EXTERN(cerror) ;\
134 #else /* __SYSCALL_32BIT_ARG_BYTES < 4 || > 20 */
135 #define UNIX_SYSCALL_NONAME(name, nargs) \
137 movl $ SYS_##name, %eax ;\
138 UNIX_SYSCALL_SYSENTER ;\
140 BRANCH_EXTERN(cerror) ;\
144 #define UNIX_SYSCALL_INT_NONAME(name, nargs) \
146 movl $ SYS_##name, %eax ;\
149 BRANCH_EXTERN(cerror) ;\
152 #define PSEUDO(pseudo, name, nargs) \
153 LEAF(_##pseudo, 0) ;\
154 UNIX_SYSCALL_NONAME(name, nargs)
156 #define PSEUDO_INT(pseudo, name, nargs) \
157 LEAF(_##pseudo, 0) ;\
158 UNIX_SYSCALL_INT_NONAME(name, nargs)
160 #define __SYSCALL(pseudo, name, nargs) \
161 PSEUDO(pseudo, name, nargs) ;\
164 #define __SYSCALL_INT(pseudo, name, nargs) \
165 PSEUDO_INT(pseudo, name, nargs) ;\
168 #elif defined(__x86_64__)
170 #include <architecture/i386/asm_help.h>
171 #include <mach/i386/syscall_sw.h>
173 #define UNIX_SYSCALL_SYSCALL \
177 #define UNIX_SYSCALL(name, nargs) \
180 movl $ SYSCALL_CONSTRUCT_UNIX(SYS_##name), %eax ;\
181 UNIX_SYSCALL_SYSCALL ;\
183 BRANCH_EXTERN(cerror) ;\
186 #define UNIX_SYSCALL_NONAME(name, nargs) \
188 movl $ SYSCALL_CONSTRUCT_UNIX(SYS_##name), %eax ;\
189 UNIX_SYSCALL_SYSCALL ;\
191 BRANCH_EXTERN(cerror) ;\
194 #define PSEUDO(pseudo, name, nargs) \
195 LEAF(_##pseudo, 0) ;\
196 UNIX_SYSCALL_NONAME(name, nargs)
198 #define __SYSCALL(pseudo, name, nargs) \
199 PSEUDO(pseudo, name, nargs) ;\
203 #error Unsupported architecture